What tells you that a lifter is bad? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Russell · 10-15-2003, 09:30 PM

Alo, pulled one of my lifters tonight to see if I can find that knock from my engine on the driver's side, that thing must have been changed out with the engine rebuild... I can still see machining marks on the sides of it... If one of these things is collapsed, or bad, what am I looking for? I'm just gonna assume on of the springs is bad...

Also, how tight is tight enough for the engine to run off those tappets? I know the way to tighten them, start the engine, slowly back off the bolts on them until you hear a ticking, then tighten it slowly till it stops, then give it 3/4 of another turn, but how tight is tight enough to start the engine without damaging it?

Destructo · 10-15-2003, 09:52 PM

I woould turn them down 1/2 a turn rather than 3/4, that seems to work a little better and insures their not overtight. And what exactly are you talking about being too tight to start the engine? The lifter preload? If so don't go more than 3/4 turn, if you have to go further to stop the noise then something is wrong.

Russell · 10-15-2003, 10:06 PM

What I mean is that I have taken my lifters out, so I have loosened those tappet things, how tight should I make them so I can start the engine later on without wrecking them

Destructo · 10-15-2003, 10:57 PM

Oh I see what your talking about, talking about the rockers? Thats the push rod goes into and they rock on a stud and push the valve down? You will actually have to set the valve lash cold before you start the engine since you pulled the lifters. If you don't have a Haynes manual you should get one, it will be able to describe how to set the valve lash cold better than I could over the internet. You can run it like that but I don't trust my ability to get them just right like that so I just do that so the engine will run without harming anything then afterwards I adjust them using the running method.

Slonaker · 10-15-2003, 11:10 PM

Look on swervins's site, www.73-87.com. He has instructions for adjusting the valves:

http://www.73-87.com/garage/valvlash.htm

Slonaker

Russell · 10-15-2003, 11:18 PM

I gotta check that guy's site more often

Mike has all the answers on that site, lol

Slonaker · 10-16-2003, 09:34 AM

Yep. Every time someone posts a queestion, I just say "look on Swervin's site."

Thanks Mike!

Slonaker

Russell · 10-16-2003, 09:21 PM

My lifters are all convex

And in really good shape. I'm 90% sure that it isn't my lifters ticking... I am wondering if maybe those rockers arn't tight enough and one is ticking..

10-15-2003, 09:30 PM	#1
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	What tells you that a lifter is bad? Alo, pulled one of my lifters tonight to see if I can find that knock from my engine on the driver's side, that thing must have been changed out with the engine rebuild... I can still see machining marks on the sides of it... If one of these things is collapsed, or bad, what am I looking for? I'm just gonna assume on of the springs is bad... Also, how tight is tight enough for the engine to run off those tappets? I know the way to tighten them, start the engine, slowly back off the bolts on them until you hear a ticking, then tighten it slowly till it stops, then give it 3/4 of another turn, but how tight is tight enough to start the engine without damaging it? __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

10-15-2003, 10:06 PM	#3
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	What I mean is that I have taken my lifters out, so I have loosened those tappet things, how tight should I make them so I can start the engine later on without wrecking them __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

10-15-2003, 11:10 PM	#5
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	Look on swervins's site, www.73-87.com. He has instructions for adjusting the valves: http://www.73-87.com/garage/valvlash.htm Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado

10-15-2003, 11:18 PM	#6
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	I gotta check that guy's site more often Mike has all the answers on that site, lol __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

10-16-2003, 09:34 AM	#7
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	Yep. Every time someone posts a queestion, I just say "look on Swervin's site." Thanks Mike! Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado

10-15-2003, 09:52 PM	#2
Destructo Registered User Join Date: Sep 2003 Location: Lewisville, NC Posts: 1,836	I woould turn them down 1/2 a turn rather than 3/4, that seems to work a little better and insures their not overtight. And what exactly are you talking about being too tight to start the engine? The lifter preload? If so don't go more than 3/4 turn, if you have to go further to stop the noise then something is wrong.

10-15-2003, 10:57 PM	#4
Destructo Registered User Join Date: Sep 2003 Location: Lewisville, NC Posts: 1,836	Oh I see what your talking about, talking about the rockers? Thats the push rod goes into and they rock on a stud and push the valve down? You will actually have to set the valve lash cold before you start the engine since you pulled the lifters. If you don't have a Haynes manual you should get one, it will be able to describe how to set the valve lash cold better than I could over the internet. You can run it like that but I don't trust my ability to get them just right like that so I just do that so the engine will run without harming anything then afterwards I adjust them using the running method.

10-16-2003, 09:21 PM	#8
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	My lifters are all convex And in really good shape. I'm 90% sure that it isn't my lifters ticking... I am wondering if maybe those rockers arn't tight enough and one is ticking.. __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)



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